This value set includes codes based on the following rules:

• Include these codes as defined in http://snomed.info/sct version http://snomed.info/sct/731000124108/version/20200901

  Code	Display
  82334004	Inderteminate
  260385009	Negative
  264868006	No bacterial growth
  385660001	Not done
  10828004	Positive
  255835006	Shiga Toxin unspecified
  608774005	Shiga Toxin 1
  608775006	Shiga Toxin 2

• Include these codes as defined in urn:oid:2.16.840.1.114222.4.5.274 version 20200526

  Code	Display
  FDD_A_519	Shiga Toxin 1 and 2

• Include these codes as defined in http://terminology.hl7.org/CodeSystem/v3-NullFlavor version 20090501

  Code	Display
  UNK	Unknown